Calculating machine



c. A. SIEWECK CALCULATING MACHINE April 22, 1924.

Filed Jan. 8,

1923 3 SheetsSheet l \N 3 mm:

Uni: 040

@Q E @wm INVENTEIR 5 M H15 ATTDRNEY April 22, 1924. 1,490,989

C. A. SIEWECK CALCULATING MACHINE Filedo dan. 8, }923 3 Sheets-Sheet 2 WITNESSES INVENTSR HIE ATTURNEY April 22, 1924. 1,490,989

C. A. SEEWECK CALCULATING MACHINE Filed Jan. 8, 1923 3 Sheets-Sheet 5 WITNESSES INVENTEIR M 3% AT HIS ATTURNEY Patented Apr. 22, 1924.

UNITED STATES our. A. smwacx, on NEW YORK, N. 1., ASSIGNOB 'ro mINeroN' ACCOUNTING MACHINE CORPORATION, OF NEW YORK, N. 1,4 CORPORATION OF NEW YORK.

CALCULATING MACHINE.

Application filed" January 8, 1928.. Serial No. 611,298.

To all whom it may concern:

Be it known that I, CARL A. Smwnok, citizen of the United States, and resident of the borough of Manhattan, city of New .York, in the county of New York and State of New York, have invented certain new and useful Improvements in Calculating Ma chines, of which the following is a specification.

My" invention relates to calculating machines, and especially to calculating machines. f

' capable of givingthe algebraic. total resulting from a series of additions and subtrac tions. One of the principal objects of my invention is to provide a clearance roof mechanism for algebraic totalizers. y invention may be regarded in some respects as an improvementon that set forth in the applicationfiled by Arthur F. Poole, J anuary 7, 1922, Serial No. 527,605 for improvements in calc-ulating'machines.

To the above and other ends my invention consists in certain features of construction n and comblnations and arrangements of.

arts, all of which will be fully set forth erein and particularly pointed out in the claims. "In the present instance I have shown my invention applied to that form of Remington accounting machine which includes a cross footer and which is shown and described in the atent to John C. Wahl, No. 1,270,471 date June 25, 1918.-

In the accompanying drawings, I

Figure 1 is a partial conventional front elevation of a Remington machine of the kind above mentioned with my. improvements applied thereto. 1

Figure 2 is a top view partly in section of a detail.

Figure 3 is a fragmentary isometric view of a part of the cross actuator. I

Figure 4 is;a fragmentary top plan view of a portion ofthe clearance proof mechanism partly sectioned away. I

Fi re 5is a plan view of the algebraic totahzer in section on the line 5-5 of Fig. 6.

Figure 6 is a right-hand end elevation of said totalizer in section just inside the righthand frame plate. v

Figure 7 is a similar view in section on the line 7-7 of Fig. 5.

Figure 8' is a fragmentary View of the totalizer in section on the line 88 of Fig.

6, and looking in the direction of the arrows at said line. I

The Remington accounting machine is so well known and the calculatin mechanism of it is so well described in the ahl patent above referred to, that I have illustrated only those fragments of the machine which immediately co-operate with the present in- PATENT OFFICE.

vention. Said machine includes a Remington typewriter having mounted on its stationary framework the stationary framework of the Wahl calculating mechanism, the latter including a casting 15, a fragment ofwhich is shown in Figs. 1 and 4. A main truck, not shown, is supported at the middle of the machine on wheels journaled in said cross bar on frame-piece 15 and at its ends said truck is connected with the paper carriag of the typewriter, and on said truck may be mounted any desired num- -'ber of vertical or columnar totalizers 16 and dummies 17, the latter consisting of a frame similar to that of a totalizer 16,'but devoid of calculating mechanism. The machine also includes across truck 18 adapted to reciprocate to the extent of a single computing column, said cross truck having a hook 2O anda co-o rating stop-piece 21, pivoted to the true: at .22 and. adapted, when the carriage comes into an adding zone in traveling from right toleft, to engage with a lug 23 constituting a but the hook 2O stands in the path of said lugs. When the carriage is moved toward the left these lugs successively pick up said hook and" draw the cross truck toward the left and as soon as said truck begins to move, the

stop 21 rises to the position shown in Fig. 1. At the end of a movement equal-to the width of a computing column the hook 20 and stop 21 are eammed down out of the path of lug 23 and the cross truck imme framework of the crow footing mechanism, which framework includes among other things a vertical end plate 24 a parallel plate 25, and a cross rod 26, i 3 connecting said plates. A lever 27 Is pivoted at 28 to the late 24 and it is normally pressed tower the left by a spring 30; The truck 18 has an adjustable stop bar 31 which when said truck jump: back toward the right is adapted to stri e the upper part of the lever 27 and press it back against the glare-24 and said truck is thus arrested.

's lever 27 isnot only part of the stop for limiting the right-hand movement of the cross truck but it is also a part of a locking mechanism which is fully described in the Wahl patent above referred to. Said lever has articulated therewith a long link 32 which is connected with the locking izers and dummies having a certain track way 34 mounted thereon for the purpose. The mechanism includes the usualv numeral keys of the typewriter, which keys are con-- nected with the Wahl actuator and which actuator includes a certain rocker or universal bar. The mechanism is so designed that whenjthe roller 33 is depressed by a totalizer or dummy and thelever 27 is pressed back against the plate 24, then said rocker or universal bar is locked to warn the o rator that he has got the carriage in an a ding column but has not hooked up the cross truck, so that if the keys were operated the number would not be accumulated in the cross totalizer. This lock is thus referred to because Iuse ,it in connection with the my clearance proof mechanism as will hereinafter appears The algebraic totalizer 35 is detachably mounted onthe cross truck 18 in much the same way as is an ordinary Wahl totalizer,

v and some of its mechanism is, as shown in the pvresent instance, identical with that of ahl totalizer. The-frame of the totalizer 35 includes two side plates 36 connected together by various sha ts, rods and bars, in accordance with the same general principles according to which Wahl totalizers are constructed and in some instances with exactly similar parts to those of a Wahl totalizer. Thus the rear parts of said plates 36 are made with the usual dove-tail formation so that they fit over the dove-tail cross truck 18. A rock shaft 37, having a finger piece 38, is pivoted in said frame plates precisely as in a Wahl totalizer, except that for reasons that will hereinafter appear, said finger piece is at the left-hand instead of In the upper .the usual spring, not shown.

A rod or shaft 43 is secured at its ends in the plates 36'by means of screws 44, Fig. 8, andon said shaft are journaled any desired number of carrying wheels 45. As

here shown these wheels are identical in construction and location and function with the carrying wheels of a Wahl totalizer. They are adapted to mesh with the cross master wheel 46 which drives them, and they carry each to the next of higher order b means of Geneva wheels 47 mounted on l evers 48, which levers are pivoted on cross bars 50 and 51, these levers 48 extending down below the totalizer at the rear thereof into position tobe operated by the regular Wahl auxilia master dog 52. vWith certain exceptions w ich will be mentioned hereinafter these levers are identical in construction, functionandmode of operation with levers of a Wahl totalizer. art of the totalizer there is a cross frame ar 53 having adjustable stop screws 54.,fo1- the upper ends of the levers 48 and these cooperate with the usual safet bar 55 pivoted in the side plates'36 at 5 Said levers are controlled by springs 57 connected to cross rods 58, these parts being substantially like parts of the Wahl machine. Stationary bars 60 extend across the totalizer in position to align the Geneva wheels 47 whenever the latter are lifted out of engagement with the carrying wheels .45.

supported by the side plates 36. These wheels are made larger than the intermediate gears of an ordinary Wahl totalizer and have twenty teeth.

In order to provide for algebraic calculation there are two sets of dials or numeral wheels, an upper set 63 for positive numbers and a lower set 64 for ne ative numbers, said .wheels being 'ournaled respectively on cross rods 65 an dials may be of the usual Wahl construction except that the lower dials 64 have the numerals arranged thereon in an order the reverse of that used on the ordinary totalizer. Each of the dials 63 and 64 has a pinion 67 meshingwith one of the intermediate gears 61. so that each of said gears drives two dials, one ofeach set of dials.

As is'well'known, the direction of rotaarrow in Fig. 3 for addition, and in reverse direction for subtraction. The re 66. The individual 105 The carrying wheels 45 drive a set of in- I termediate gears 61 journaled on a shaft 62 wersal of this master wheel can be effected 'either manually or automatically, the automatic means including certain subtraction cams 68 mounted on the vertical totalizers 16 and dummies 17, and a follower roller 70 mounted on an arm 71 and normally pressed up by a spring but adapted to be into the first totalizer 16 and into the cross.

' and the old or pick-u depressed by said cams. In Fig. 1, the nachine is shown arranged for work on a ledger sheet in which debit itemsare added totalizer 35; credit items are added into. the second totalizer 16 and subtracted in the cross totalizer; the new balance is written in the field defined by the left-hand dummy 17 and subtracted from the-cross totalizer, balance is written in the column defin by the right-hand dummy 17 and added into the cross totalizer. This arrangement is shown merely by way of illustration, as many other arrangements can be used. It sometimes happens that the amounts subtracted from the cross totalizer exceed the amounts added init. For example, if the machine is working ledger sheets the depositor may chexzk out more than hehas on deposit. In that case the cross totalizer 35 should show an overdraft, and. it is in order that this overdraft maybe represented by plain figures that can be copied on to the paper in the third column that an algebraic totalizer is desirable on this particular piece of work.

I- shallnot go into any extended discussion of the principle of an'algebraic total- I izer, this being well understood, and the gen- "eral principle of the particular one shown in the drawing is also well known, cross totalizers of construction similar in many res ects to thepresent one being fully shown described in certain prior patents to Arthur Poole, such for example, as Pat ent 1,296,118. dated March 4, 1919 and 1,301,318 dated April 22, 1919. Suffice it to say for the present that so long as the total indicated on the totalizer is positive it can be read from the upper series of dials 63 and when said :total is negative it can be read from the lower series of dials 64. v 50 The cylindrical part ofthe shutter is sup-.

ported by two end plates pivoted on the shaft 65. The other shutter 76 is similarly adapted on occasion to align with the sight-' opening 77 for the dials 64 to conceal said wheels and to swing down to the position shown in the drawings to display said dials;

nuance on bank and said shutter has end plates'78 pivoted on the'sha-ft 66. a

In order to shift the shutters 72 and 76 and in order to insert the fugitive 1 which it is necessary to addor subtractwhen the totalizer passes through zero, a handle 80 screwed on the end of a lever 81 is rovided. This lever has a hub 79 pivote on the shaft 62 and it projectsfrom the front of the totalizer through a slot. 82 in the easing. The construction is such that when this handle is moved from its upper to its lower position is shifts the shutters to conceal the negative dials 64 and to expose the positive dials 63 and this motion of the lever also adds 1 (positive) into the totalizer; and when the handle is moved from its lower to its upper position shown in the drawing it reverses the shutters to exhibit a negative total on the lower dials 64 and subtracts 1 in the totalizer. The precise construction of this lever can be varied but as here shown'the main part ofit is made of sheet metal and its hub 79 has mounted thereon a triangular piece 84 which is rigidly connected with the lever 81 by means of said hub and also of two osts 86 and 87, the first forward of the s aft 62 and the last behind said shaft. The right-hand end piece 78 of the shutter7 6 hasa notch which embraces the post 86, and said end piece also has a pin which is embraced bya similar notch in the end piece 75 of the shutter 72 so that an operation of the handle 80 shifts both shutters. When said handle isin its upper postion shown in the drawing the lower dials; 64 are visible and when said handle is moved to its lower position the reading is from the positive dials 63.

The fugitive 1 is inserted by devices operated by thepost 87. The part immediatel operated by said post is a structure including a hub 88, Fig. 8, journaled on the right-hand end of the rod 43. This hub has rigidly mounted thereon an outer plate 90 and an inner plate 91 and it has a reduced part on which is loosely pivoted a third plate 92.

The plates 90 and 91 are rigidly connected at their lower parts by a post 93 having its ends reduced and riveted into said plates as shown in Fig. 8. The plate 91 has an arm extending upward and forward and bifurcated to embrace the post 87 thus interlocking this pivoted structure with the lever 81 so thatsaid structure rocks with the lever 81 but in the opposite direction. Said plate 91 also has an armor nose 94 (Fig. 7) extending upward and rearward and 00- operat ng with a V-shaped point or nose 95 on a lever 96, whichis pivoted on the frame rod 50 and is controlled by one of the springs 57 and co-opera-tes with one of the stop screws 54, the same as the ordinary transfer levers 48; but this lever 96 does not extend Ill downward into position to be operated by the master dog 52. It is onthe contrary operated by the nose 94 which is rounded for the purpose. The construction is such that the spring pressed lever 96 will retain said nose 94 and consequently the plates 91, etc., and the hand lever 81 in either of the two positions to which they can be set; but

\when force is applied to the lever 81 the 0 lever 96 will yield and allow the parts to move to their alternative positions.

The plate 92, which is loosely pivoted on the hub 88, has two depending arms spaced apart as shown and embracing the post 93 but with lost motion so that said plate 92 is obliged to partake of the swinging of the plates 91 and 90 but has a limited motion independently thereof. This plate 92 has a nose or cam part 97 which lies by the side of the nose 94, the end of said cam part beingconcentric with the shaft 43, and of a suitable len h for the purpose about to be described. o-operating with this nose 97 is a nose 98 formed on a plate 100 lying beside the lever 96 and riveted thereto at 101 and therefore constituting in effect a thickening of a art of said lever 96, the eflect being to thicken said lever so that its nose can co-o rate not only with the part 94 but also with the part 97. In Fig. 7 the part 100 is sectioned awa but the outline of it is indicated by broken lines. Begin- A ning with the parts in the position shown in Fig. 6, if the handle 80. be moved downward the noses 94 and 97 will move toward the rear of the machine. The lever 96 will be cammed upward by the arm 94 but once elevated it will not immediately drop because the nose 98 will be held up by the cam dwell 97 until the lever 81 has almost completed its motion, when the nose 98 will pass off of the dwell 97 and will cam the nose of plate 92 towards the front of the machine. As this plate is loose on the hub it will move guickly and allow the lever 96 to be drawn own by the spring 57 with asnap. The construction shown in the patent to Arthur F. Poole, No. 1,301,318 has devices similar in principle to those just described and the function of said devices is explained in said patent.

It will be perceived 'that the relation of the lever 96 and the nose 94 is such that said lever 96 holds the plate 91 firmly'at the limit of its motion in either direction.

In order to add or subtract 1 whenever the lever 81 is operated there is pivoted on the shaft 43 between the plate 91 and the units carrying wheel 45 a gear segment 102, Figs. 7 and 8, and this segment has two pins 103 projecting therefrom one on each side of the arm 94 but spaced apart so that the distance between them is greater than the width of said arm. When the handle 80 is in its upper position said arm 94 presses the forward pin 103 firmly against a stationary pin 105, Fi 7, projecting inward from the ri ht-han frame plate 36 and thus holds t e segment 102 in the ition shown in 'Fig. 7. When the ban e 80 is pulled downward the arm 94 moves toward the rear of the machine and during the first part of its motion it does not operate the segment 102 but in the last part of its motion it engages the rear pin 103 and moves it toward the back of the machine until ar-' rested by another fixed pin or post 104, also projecting inward from the plate 36. Said arm 94 will be firmly held in this position by the lever 96. The segment 102 has on its 80 upper part a series of gear teeth corresponding in position and pitch to some of the gear teeth of the carrier gears 45 and the con-.

struction is such that an operation of the handle moves said segment to the'extent I of one tooth, in positive direction when the handle is moved downward and in negative direction when the handle is moved upward.

The motion of the segment 102 is communicated to the units wheel 45 by means of a Geneva pinion 106, Figs. 5 and 7, in all re-v spects like the ordinary Wahl transfer pinions and mounted like them on one of the levers 48. This Geneva pinion has the usual scalloped middle art of greater diameter than the gear-toot ed part and this enlarged scalloped portion is functionless exceptthat it co-operates with the aligning bar 60 when the pinion is raised out of. engagement.

I have shown the algebraic totalizer 35 occupyin the position of the cross totalizer in the Wihl mechanism. In the Wahl machine, the cross-totalizer is usually freed from the vertical totalizer in that step of the carriage which immediately follows the writing of the digit in the lowest denominational position, and said totalizer is free of the master wheel 46 when it'occu ies its normal ri ht-hand .or jump-bee position. When the handle 80 is operated it operates the lowest register whee and this may result in carrying through towheels of highest order. This handle should therefore never be operated when the totalizer is in engagement with the master wheel. To prevent it from ever being so operated means are provided for locking the handle 80 except when the totalizer is in itsright-hand position free of the master wheel. To this end the plate 90, which it will be recalled is positively connected withthe handle 80, is prolonged so as to form a rear stop surface 107 and a front stop edge 108, and these surfaces or edges interlock with a flan 110 bent off from a bar 111', Fig, 3, Whic bar has two arms 112 and 113 secured respectively to the frame plates 25 and 24 byscrews 114 and 115, both of these being screws alread pres ent in the Wahl machine. Said We ma- Ill l locking tooth 116 but at alower level so that chine also ordinarily includes a locking tooth 116 bent up from a piece of sheet metal 117 secured .to the frame plate 25 by the screws 114. This locking tooth is in alignment with one of the teeth of the master wheel 46 and during the operation of the machine said tooth engages and locks the carrying wheel 45 of next lowerorder than the one en aged at the time by the master wheel. The flange 110 constitutes a sort of continuation of the said flange does not lock the carryin gears '45 but does prevent motionv of the p ate 90 and consequently of the handle 80. The two stop surfaces 107 and 108 are so disposed that when the handle 80 is in its lower position the stop surface 107 will ride just in front of the flange 110 and when said handle is in its upper position the edge 108 will ride just behind said flange as shown in Fig. 6. In either event once the plate 90 gets into engagement with the'flange 110, as it does whenever the totalizer is in engagement with the'master wheel, the handle 81 cannot be shifted. Said flange terminates at 118, Fig.

' 3, so that when the totalizer is in its righthand positionwhere it is out of engagement with the master wheel, thehandle 81 is free to be operated.

In order to notify the operator when to shift the handle 80 the highest register dial in each of the series 63 and" 64 has .been

marked with colors instead of digits, the dial showing a red spot when it is in its 9 position.

The mechanism thus far described is not of my invention. The Wahl mechanism, ex-

ver 81 instead of in the manner hereinshown. Also I have shifted the shafts 65 and 66 about the shaft 62 as a center in a direction forward and downward in order to makeroom for certain devices of my invention to be hereinafter described. j

Clearance proof mechanism for an alge- .braic totalizerof the kind herein described ,must of necessity differ from that which is applicable to an ordinary totalizer, for the reason that positive zero and negative zero correspond to different positions of the gearing. When one of thedia'ls 63 has its zero registering -with the sight-opening the correspending dial 64 has the 9 registering with the sight-opening and, vice versa, when one of the dials 64 has itszero' on the reading line the corresponding dial 63 has a 9 on set of dials'is under consideration. In pro viding mechanism, such, for example, as feeler mechanism to test the state of the fore necessary to provide some selective totalizer as to clear or not clear, it is there scheme to distinguish between thetwo kinds 7 of zero. Mechanism havin this selective power or property is shown 1n the Poole a plication ereinbefore referred'to. It'ist e princi al object of the resent invention to provi e improved mec anism having the property described.

The Remington accounting machine as sometimes constructed includes clearance proving mechanism for the cross totalizer. This mechanism includes a lever 120, Fig. 1, which, at the time when said cross totalizer should be clear, is adapted to be swung to the right by a spring 121 to actuate the locking mechanism hereinbefore referred to. The lever 120 is pivoted at 122 to 'a sheet metal framepiece 123' secured to the end of the casting 15 and it has "at its lower end a lug 124 bent ofi' therefrom in position to actuate the lever 27. A button 125 on said tion by a latch consisting of a bell crank 126 pivoted to the framepiece 123 at 127 and normallyheld up by the spring 121 into latching engagement with a lug or ear bent backward from the upper end of the lever 120. The latter lever can bereleased by rocking the latch 126. This is done in that step of the carriage immediately followin the writing of the last digit in thethir column by means of a push wire 128, the left-hand end of which is articulated with the rearwardly extending arm 130 of a bell crank which also has a-leftwardly directed arm 131. This bell crank is bent up out of sheet metal in such a way as to give it bearing at two places spaced apart on a stud 132 secured to the horizontal overhanging part 133 of a bracket or framepiece which also has an upstanding part 134 and a' horizontal part 135, the last secured to the casting 15 near the middle of the machine by screws 136. At the middle of the machine said casting has an upright and overhanging bracket 137 carrying amongst other thin a pointer 138 which co-o crates with sea 0 marks on the several vertlcal totalizers and dummies. The dummy 17 which in this pari ticular instance locates the third column, has

secured on top thereof by means of screws 140 a bar 141 which extends to the right of said dummy to a suflicient distance to compensate for the fact that the lever arm 131 is not quite in the middle of the machine said arm projecting above the right-hen dummy 17. The bar 141 has its right-hand end bent u to form an arm 142, the rear end surfaces 0 of which Is beveled .on its left-hand side to act on the beveled right-hand side of a do 143, which dog is pivoted at144 to the be crank arm 131. The dog 143v is urged in clockwise direction, Fig. 4, by a spring 145, its motion in that direction being limited by a stop in 146 on the dog engaging the'rear edge 0 the lever arm 131. On the return motion of the carriage the abrupt edges of arm 142 and dog 143 engage each other with the result that the dog is deflected toward the right to let the arm 142 pass it without operating the bell crank, but when the carriage is stepping toward the left, the beveled parts 142 and 143 engage as shown in Fig. 4. The parts are shown in Figs. 1 and 4 in position for writin the last digit in the balance column. when said last digit is written the carria e takes a step to the left and the arm 142 cross the dog 143 and bell crank arm 131 toward the rear of the machine, rocking arm 130 toward the right and tripping the latch 126, whereu on the lever 120 immediately operates the l dck lever 27. The bell crank 130, 131 is immediately restored to its normal position by a suitable spring 147. Means are provided to immediately restore the lever 120 to its normal position in case the cross totalizer is clear, but not otherwise. The lever 120 has a horizontal arm 148 extending leftward and having at its free end an ear 150 bent back therefrom and notched and guided by a part of the framepiece 123. This arm 148 has rigidly mounted thereon so as to be in effect a part thereof, a bar 151, said bar lying somew at forward of the arm to which it is secured by screws 152. and posts 153. The bar 151 has its upper art bentforward to form a horizontal shel to which at 154 there is pivoted a cam lever 155, to an ear of which is connected one end of a spring 156 the other end of which is connected to an ear bent ofi' from the bar 151. This spring tends to rock the leftward arm of the lever 155 toward the rear of the machine, its motion in that direction being limited by a foot 157 striking the arm 148. At its left-hand end this lever 155 is bent first downward and then rearward forming a lower shelf 158 having its two edges beveled to form an inverted V, the point of which is adjacent to the upwardly inclined end 160, Fig. 1, of the bar 151. The Remington accounting machine as now being described has in the cross totalize a lever or trippet similar to the lever or trippet 161 shown in the present case and consisting of an upstanding arm lying against the right-hand frame plate of the cross totalizer, pivoted on the cross bar 51 of said totalizer and extending upward through a guide slot in the casing plate .of the totalizer. This trippet is connected with clearanoe testing devices in such a way that if step of the carriage that causes lever 120 to.

be released from its latch 126, also causes the cross truck 18 to be released from the dummy 17, and said truck and the totalizer' 35 are immediately drawn toward the right by the spring 19. If the totalizer is not clear the trippet'161 on the jump-back of said totalizer toward the right, moves in a path a little forward of the bar 151 and does not restore said bar; but if said trippet occupies its rear position, which it can do only in case the totalizer is clear, then the end of said tri pet acting on the inclined end 160 of the bar 151 restores the lever 120 to its normal unlocking position. It is the function of the lever 155 and especially of its cam shelf 158 to transmit to the trippet 161 the power of the spring 156 to force said trippet to its rear osition in case, the totalizer beinv clear, t at can be done. If the totalizer is clear said trippet striking the inclined edge of the shel 158 is deflected rearward so that its up er end comes under the incline 160 and disa les the lock. If the totalizer is not clear said trippet is unable to make the required motion toward the rear and the lever 155 is forced to yield forward as shown in dotted lines in Fig. 2 and the locking mechanism will then remain in operation. The clear signal mechanism above described is not of my invention.

My invention consists in improved devices withinthe algebraic cross totalizer 35, which devices control the trippet 161 in ,order to make it function in the manner above described. It is a well known property of algebraic totalizers of the general sort hereinbefore described that when such a totalizer is cleared bywriting and subtracting from.

tion of the totalizer is not brought back to the same position as when a positive total is copied and subtracted from the dials 63. The position of theregistering train that corresponds to ,zeroon' the dials 64 is the position that corresponds to 9 on the dials 63. The problem of testing for clearance in a totalizer of this character is therefore complicated by this fact which may perhaps be expressed by saying that negative zero is not the same position. of the registering trains as positive zero. In the application of Arthur F. Poole herein before referred to means are provided and controlled by the handle Ill 80 for automatically shifting a clearance testing feeler to one position for positive zero and'to another position for negative zero, the same feeler and the same short tooth on the same wheel being used inboth instances. According to my invention I make a short tooth'on one wheel in each denomination to testfor positive zero, and a shorttooth or another wheel of-the same train to testsior negative zero, and use different feelers in the two instances. I provide selective mechanism controlled in the present instance by the handle 80, and in general by whatever part it is in the machine that distinguishes between ositive and negative totals, the construction eing such that when testing for positive zero one set of short teeth and one feeler are used, and when testing for negative zero the other set of short teeth and the other feeler are used. So far as I am aware it is new in mechanism of this character to provide different wheels in the registering train, one with a distinctive point (in the present instance a short tooth) to test for positive zero, and the other with a distinctive point to test for negative zero; and it is also new to provide two feelers, one for positive and the other for negative zero; and it is also new to provide selective mech 'anism for bringing two testing devices into use alternatively, depending on what kind of zero is to be determined.

In the present example of my invention each ofthe pinions 67 of the lower set of dials 64 has one tooth 162 made shorter than the others and a feelercomb 163 is provided capable of co-operating with the teeth of the pinions 67 in such fashion that if one of the dials 64 does not stand at zero a long tooth of its pinion 67 will be struck by .a tooth of the comb 163; but. if all of said dials stand at zero all of theshort teeth 162 will face the teeth of the comb 163 and said comb can move further toward the shaft 66 than it can if some wheel does not stand atzero. I also make each of the pinions 67 of the upper set of dials 63 with a short tooth 164 capable of co-operating with another comb 165 in the same general manner as described with respect to the comb163. I use one of these combs totest for positive zero and the other to test for negative zero. In the present instance the u per comb 165 is used for positivezero and t 0 lower comb 163 for negative.

I,have not deemed it necessary to illustrate in detail the precise construction of the feeler combs 163 and 165, devices suitable for the purpose havin been constructtotalizer and milled out, the comb 163. on

its upper face and the'comb 165 on its forward face, leaving narrow webs capable of moving into the spaces between the, dials and contacting with thepinions 67. Each of said combs-is made at its ends with trunnions 166, which trunnions project, through slots 167 in the frame plate 36 of the totalizer, Fig. 7. These trunnions 166 are the pivots of the ,feeler combs. The construetheir trunnions in the upper ends of the slots167, and if both combs bethen rocked toward the dial pinions the lower comb 163 will co-operate with the lower pinions 67 to test for negative clearance, but the upper comb will not reach the'upper inions 67.

If 'on the other hand said combs set with the trunnions in the lower ends of the slots 167 and be then rocked as described, the upper comb 165 will c'o-operate with the up er pinions 67 to test for ositive clearance ut the lower comb 163 wi not move far enough to engage the lower pinions 67.

In order to shift the combs up and down in the manner .just described, I use selective mechanism comprising two two-armed cam plates or levers 17 0 'mounted respectively on the two'ends of the'shaft 62 which carries the transmitting gears 61. Each of these cam plates has a hub 171fixed to the shaft as, for example, by a pin 172, so that the two cam platesiat the two ends of the shaft rock together. Each of said plates has in it two cam slots 173, Fig. 6, through which the trunnions 166 pass,-said slots being so formed that when the plates stand in the position shown in Fig. 6 they hold said trunnions in'the upper ends ofthe slots 167 but if said plates be rocked counter-clockwise'in said Fig. 6 they will cam the trunnions to the lower ends of the slots 167. In other words, when these plates are set as shown in the drawings, the machine is in position for testing for negative zero but if they be rocked counter-clockwise the 'machine will be set for testing for positive zero.

the same shaft 62 that these cam plates are mounted on and t e ri ht-hand cam plate 170 lies just to the right of said lever. Said cam plate is formed with two radial edges 174 anda pin 175 projects from the.

lever 81 between these two ed es, which edges are spaced apart so as to al ow a suit.

able amount of lost motion to said pin,

Fig. 6the lever is shown in its negative 0- sition and this pin, acting on the upper e go 174, holds the cam plates 170 in their negative position. If thelever be pushed down 1a tion is such that if both combs be set with the lower edge 17,4 and force the cam p ates to their positive position. Said cam plates are arrested in their two positions by. any suitable stops, those shown in the present instance consisting of two studs 176 projecting inward from the right-hand frame plate 36 to which they are riveted.

In the clearance testing operation the feeler combs are operated by the trippet 161; that is to say, they are rocked about their trunnions 166 through suitable connections. The lower feeler comb has a lever arm 177 forced over its ri ht-hand trunnion 166 and secured a ainst slipping on said trunnion by a dowel 1%8 and this lever extends rearward and has an operating pin 180projecting toward the right from its rear end. The upper comb 165 has an operating lever- 181 similarly mounted on its right-hand trunnion 166 and similarly secured by a dowel 182. This lever arm also extends rearward where it has projecting therefrom an operating pin 183. The pins 180 and 183 project respectively into suitably formed slots 18% and 185 ilia sheet metal lever 186 pivoted on a headed stud 187 riveted into the righthand frame plate 36 as shown in Figs. 6 and 8. The lever 186 is so shaped as to avoid interference with other parts of the machine but it has what amounts to a nearly horizontal rearward extending arm having in its free end a slot or notch 188 which is en aged by a stud 190 projecting from the si e of the forwardly directed arm of the trippet lever 161, which lever as shown in Fig. 6 has the general form of a bell crank. The up r arm of'said trippet is shown in Fig. 6 in its forward position andthe pin 190 therefore in its lower position. said trippet be forced toward the rear of the machine with other parts standing as shown in Fig. 6, the pin 190 would move upward and rock the lever 186 counter-clockwise.

The slots 184 and 185 are so disposed that this motion ofthe lever 186 would rock the lower comb 163 clockwise and the upper comb 165 counter-clockwise. In other words,

it would rock these combs toward their respective sets .of pinions 67. The parts are shown in their negative positions and the one lower pinion 67 shown, is in its zero position; and if all of the other pinions of this set are also in their zero positions the comb 163 would be able to rock as described and the trippet 161 would be able to move toward the rear of the machine driven by the spring pressed cam 158. Said trip would, therefore, be caused" to pass underneath the incline 160'and would release the locking devices above described, thus indicating that the totalizer had been cleared from a negative total. If. on the contrary, some one or more of the lower pinions 67 did not stand in their zero positions, one or more of said inions would resent a long tooth tothe' eeler comb, iv 'ch therefore would be unable to rock as described. The

lever186 and trippet 161 would be unable to move and the locking mechanism would remain in its locking position, thus notifying the operator that he had failed to clear the machine. If the handle be moved to its lower or positive position, similar operations would ensue except that now it would be the upper comb 165 acting on the upper pinions 67 which would determine the operation of the trippet 161.

Various changes may be made in the details of construction and arrangement without departing from my invention.

What I cl'aimas new and desire to secure by Letters Patent, is

1. In a calculating machine, the combination with a register capable of indicating positive and negative totals, of two clearancetesting devices, one operative to test said register as to a positive state and the other operative to test said register as to a negative state. i

2. In a calculating machinegthe combination with a register capable of indicating positive and negative totals, of two clearance testing devices, one operative to test said register as to a positive state and the other 0 erative to test said register as to a negatlve state; and selective means for operating said devices. p I

3. In a calculating machine, the combination with a register, of two clearance testing devices operative on said register at diiferent points to test said re 'ster, one of said devices as to one state an the other of said devices as to another state.

4. In a calculating machine, the combina.

tion with a register, of two clearance testing devices operative on saidregister at said devices as to one state and the other of said devices as to another state; and means for rendering one or the other of said devices operative, depending on the state for different points to test said register, one of tion with algebraic calculating mechanism capable of indicating a positive total and a negative total and having a part shiftable to one position for positivetotals and to an; other position for negative totals, of two state tasting devices so connected that one of them is operative in one 'tion of said part and the other in the ot or position .of said part. i

I eelers, and means to adjust the ivots of said feelers to make them alternatively operative to test said'registering mechanism 8. In a calculating machine, the combination with algebraic calculating mechanism having a part that occupies one position for positive totals and another position for negative totals of clear signal mechanism, two state testin I totals and the ot er for negative totals, and

means whereby said part when in one posi- 2 tion places'said clear signalmechanism unof said der the control of one of said devicesand when in its other position places said clear si a1 mechanism underithe control of the ot er of said devices. I

9. In a calculating machine, thecombina tion with registering mechanism, of two clearance testing devices, apart shiftable to two positions, and means connected with said art for movi said devices toward and m the registering mechanism so that in one position of said part one of said devices is operative and in the other position part the other of said devices is operative. v

10. In a calculating machine, the combination with registering mechanism, of two clearance testi trolled by said trippet.

11. In atotalizer, the combination with the register wheels, of two feelers for alternative co-operation with said wheels, a lever l1 86 connected with both feelers, two control-' l devices-170 connected with the ivotsat to operative and inoperative positions, and

j clear signal mechanismv connected with .said

lever 186.

1 2. In a calculating machine, the combination of-registering mechanism having a se-v ries of: denominational trains of gearing,

two wheels in each denomination having nation of a register each a distinctive point, and means for testing said two wheels ,one for positive and the ot er for negative clearance.

13. In a calculatin devices, one for positivefeelers, a trippet connected with said feelers, means for shifting the con-v trol of said trippet from one of said feelers to, the other, and clear signal mechanism conends of said feelers and shi' able to -move said pivots and feelers alternatively tive point, means shiftable to indicate positive and negative totals, and clearance testing means shiftable with. said shiftable means to test one wheel in each denominational train for positive clearance and another wheel in each denominational train for negative clearance. I

15. In a calculating machine; the combination with a master' actuator. and a totalizer having relative travel to different denominational positions, of'a trippet, clearance testing devices controlling the operation of said trippet, and means for caus' said devices to co-operate with one wh z: of each enomin"ation for ositive clearance andlwi h anotherwheel o each denomination for negative clearance.

16. In a calculatingmachine, the combination with a master actuator and a totalizer, said actuator and totalizer having rela-- tive travel, of clear signal mechanism, clearance testin mechanism controlling the action of said 0 ear signal mechanism, and means brought into operation by such relative travel of the totalizer and its actuator to cause said clearance testing mechanism to test the position of one wheel of each denomione'set or indicatin positive and the other I i for negative totals, evices shiftable to one position to display apositive total and to. another position to display a ne tive total, and means connected with said s iftable devices ,for testing one of said sets of dials for positive clearance and the other of said sets ofdials for negative clearance.

18. In an algebraic totalizer having a ,train of gearing in each denomination, the combination with said trains of gearing, of

two feelers, one for co-operation with one wheel of each denomination and-the other for eo-operation with another wheel. of each denomination, shiftable devices which when moved to one position'move one of said feelers into and the other outof operative position, and vice versa, andmeans for operating said feelers to cause the onethat ,is'm operativeposition at the time to test. for clearance, one of'said feelers being adapted to test for positive and the other for negative clearance. 7

ing said feelers into operative position alter natively according to the kind of totals indicated at'the time, and means operated by the jump-back of the totalizer for causing 19. In a calculating machine, the combi-.

the operative feeler to test said totalizer for ing said testing mechanism to co-operate clearance. with one or the other of said wheels in each 20. In a calculating machine, the combidenomination, depending upon the condi- 15 nation with a jumping algebraic totalizer tion of the totalizer at the time.

5 having a registering train in each denomina- Signed at the borough of Manhattan cit' tion, of clearance testing mechanism operaof New York, in the county of New or tive on one wheel of each denomination in and State of New York, this 6th day of Jan. case the totalizer is set to indicate a positive A. D. 1923.

total and on another wheel of each denomiv CARL A. SIEWECK. 10 nation in case said totalizer is set to indi- Witnesses:

cate a negative total, and means operated CHARLES E. SMITH,

by the jump-back of said totalizer for caus- E. M. Wm. 

